Integrated speech enhancement and coding in the time-frequency domain
نویسندگان
چکیده
This paper addresses the problem of merging speech enhancement and coding in the context of an auditory modeling. The noisy signal is rst processed by a fast wavelet packet transform algorithm to obtain an auditory spectrum, from which a rough masking model is estimated. Then, this model is used to re ne a subtractive-type enhancement algorithm. The enhanced speech coe cients are then encoded in the same time-frequency transform domain using masking threshold constraints for quantization noise. The advantage of the proposed method is that both enhancement and coding are performed with the transform coe cients, without making use of the additional FFT processing.
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